Deck Footing Depth Calculator
Footing hole depth below the frost line.
Work It Out And Get Clear Answers
Footing hole depth below the frost line.
Deck Footing Depth Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Press Calculate to see the result.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
Deck Footing Depth Quick Guide
Typical values for reference.
| Frost depth (in) | Gravel base (in) | Hole depth |
|---|---|---|
| 36 | 6 | 42 in |
| 18 | 6 | 24 in |
| 72 | 6 | 78 in |
| 36 | 3 | 39 in |
| 36 | 12 | 48 in |
| Rule of thumb: check your inputs, use the result as a guide and round sensibly. | ||
Deck Footing Depth FAQ
Answers to common questions about this calculator.
Footings should bottom out below the local frost depth.
It uses the default inputs shown and the formula described above. Change any value and press Calculate to see how the result moves.
It is an estimate based on the inputs you enter. Check real quotes, labels, product data or official guidance for important decisions.
Yes. Replace each input with your own figures and press Calculate to update the result.